Hi Lars
I managed to - as an administrator, install CadTools, open Autocad and run the Cadtools exe file.
Unfortunately I now get the following message:-
Runtime error 339
Component @mscomct2.ocx or one of its dependencies not correctly registered: a file is missing or invalid.
I have noticed that this file and mscomctl.ocx, msflxgrd.ocx and msvbvm60.dll are in the Cadtools/windows/system32 folder if that means anything.
I do hope you can solve this problem as I use Cadtools a great deal.
Best regards